District of



(No Model.) 4 Sheets-Sheet 1..

J. H. PARKHURST. MACHINE PoR MIXING MORIAR.

No. 440,651. PatentedV Nov. 18,1890.

IIN' Wg l (No Model.) 4 sheets-sheet 2.

J. H. PARKHURST.

MAHINE FOR 'MIXING MORTAR.

(No Model.) 4 Sheets-Sheet 8.V

J. H. PARKHURST.

MACHINE FOR MIXING MOR'I'AR.

NGA/10,651. Patent-ed Nov. 18, 1890.

-z ||i 'r' h1 I 10% f w; l w 1|. M my l b Q IIl @E E., npr-* L l' X"|f 141j.

PQ n Il (No Model.) 4 Sheets-Sheet 4.

J. H. "PARKHURST MAGHINE PUR MIXING MORTAR.

No. 440,651. i Patented Nov. 18. 1890.

UNITED STATES PATENT OFFICE.

JOHN "II. PARKHURST, OF VASHINGTON, DISTRICT OFOOLUMBIA.

MACHINE FOR MIXING MORTAR.

SPECIFICATION forming part of Letters Patent No. 440,651, dated November18, 1890.

Application filed July 16, 1890. Serial 110.358,941. (No model.) l

T0 all whom it' may concern:

Be it known that I, JOHN H. PARKHURsT, va citizen of the United States,residing at Washington, in the District of Columbia, have inventedcertain new and useful Improvements `in Machines for Triturating andMixing Materials for Making Mortar and other Products; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the saine.

My invention consists in certain novel combinations of mechanism wherebya machine comprising a backwardly semi-rotating concave and afoiwvardlymevolvin g armed triturator and mixer, specially adapted fortriturating or mixing substances used in making mortar, plaster, orbrick and other analogous product and automatically discharging thefinished product, is produced, the combination being such that theconcave remains stationary until the trituration and mixing are fullyaccomplished, and then can be gradually revolved in a reverse directionto that in which the armed triturator and mixer is caused to continueits revolutions, and thus the substances by their gravity and the actionof the triturator and mixer are forcibly discharged upon the ground orinto a proper receptacle, the combination also being such that the powerfor imparting the semi-rotating movement to the concave can be derivedfrom the same shaft that revolves the armed triturator and mixer. Themachine is also so oonstructed and organ ized that the pulleys of thebelts which move the concave forwardly and backwardly can beautomatically unclntched at' the proper time. The head of thetriturator, after its arms are taken off and the linings of thejournal-boxes removed, can be slid out of said boxes, and the extent oftriturating and mixing surface presented by the arms is greatlyincreased and the liability of the substances adhering to the arms asthey rise out of the mass is avoided, all as will be hereinafterdescribed.

In the accompanying drawings, Figure l is a plan view of my improvedmachine, a slight portion of the flange of the concave and of one of thej ournal-boxes being broken away. Fig. 2 is a cross-section in the lineo: x of Fig.

l. Fig. 3 is an end view of one 01"; the triturator and mixing arms.Fig. 4 is a side view of the machine. Fig. 5 is an end view of the same.Figs. 6, 7, S, 9, and lO are details of the machine.

Ain the drawings represents suitable framework.

B is the concave in which the substances to be treated are placed. Thisconcave is hung upon the horizontal cross-beams a a of the frame bymeans of flanges b of journals b, and has a semi-rotating movement withsaid journals. These journals are confined in position by screwcaps b2and have, respectively, a square or many-sided hole b3 through them forthe reception of squareor manysided journal-bearing linings bi, saidlinings boing cylindrically bored, as indicated at b5.

O is a triturator or mixer comprising a head c and arms c', the saidhead being extended at each end so as to form shafts c2 for thereception of pulleys D D D2 and a double` acting sliding clutch D". rlhesaid extensionshafts are tted snugly in the bearing-linings t* of thejournal-boxes I). On the outside periphery oi' the concave at anysuitable place a segmental rack Eis applied, and into this rack a pinionF on a longitudinal horizontal shaft G gears. v

H H are pulleys on the shaft F at points in lines with the pulleys D D2.To these pulleys H Il run belts I I from the pulleys D D2, one of saidbelts l being crossed, as shown. The lever D4 of the clutch D3 ispivoted by a horizontal longitudinal rod D5 to the frame A, and bymoving this lever in the direction of the arrow l the clutch-pins willbe caused to engage with the pulley D2, and by moving it in thedirection of the arrow 2 it will be caused to engage With the pulley D.When the clutch is engaged with the pulley D2, the pinion will cause theconcave to move in the direction of the arrow 3, Fig. 2, and therebycause the concave to assume the position shown in said figure, thetriturator and mixer continuing to revolve in the direction indicated bythe arrows il, the arms of the triturator thus acting, in conjunctionwith the dumping movement of the concave and the gravity of the materialtherein, to facilitate and forcibly discharge the material.

For the purpose of insuring a very thor- IOO ough trituration and mixingof the material the arms c are formed with a suitable flare from theirpoints of attachment to the head c to their outer extremities, and tolessen the liability of the material hanging upon the arms as theyemerge from the material in the concave the arms are made of triangularform from near the head c to their outer ends, thus presenting a sharpcentral edge and two beveled sides, and for decreasing their Weight theyare flattened on their up per surfaces. It will be seen from thedrawings that the width of the arms at their outer ends is great enoughto insure the overlapping by an intermediate arm of a preceding andsucceeding arm, and thus about double the amount of friction-surface forthe triturating and mixing action is secured along the concave over thatwhich would be obtained if the arms were made with parallel sides anddid not extend laterally beyond one another. In the illustration giventhe arms are formed with angular flanged plates c5, and by means ofthese plates c5 and caps c6 and screws or bolts the arms can be fastenedto the head, and when necessary separately detached; but other modes ofapplying these arms may be adopted. The arms might be cast on a hollowhead and short shafts in- Serted into the ends of the head and firmlysecured, instead of the shaft ends being formed with the head, or thearms might be constructed with square hubs and slipped upon the shaft.

For the purpose of automatically operating the clutch-lever D4 andclutch at the moment the concave has completed its dischargingmovement,trippingpins d d are provided o n one of the heads of theconcave, and upon the frame A is provided a shifting mechanismconsisting of a pivoted lever d2, a slotted bellcrank lever d3, andalink d4, the latter loosely connected to the handle end of theclutch-lever, as shown. With this arrangement of clutch-lever andclutch-shifting mechanism it will be seen that when one of the pins dcomes in contact with the lever d2 it causes said lever to move thebellcrank lever d8 and said lever through the link d4 to draw the pinsof the clutch D3 out of engagement with the pulley D2, and thereby causethe concave to cease its backward movement. When the concave hascompleted its backward movement, the ange h6 thereof rests f latwiseupon one of thetoplongitudinal timbers of the frame A, as shown in Fig.2, and Whenit has again assumed its normal position, as in Fig. 5, saidange rests flatwise upon a top frame-timber on the opposite side of themachine, as shown in said Fig. 5. The concave is caused to return to itsnormal position by means of the crossed beltl and its pulleys D H', andthese parts are brought into action by the operator moving the clutch inthe direction of arrow 2 by its handle into engagement with the pulleyD. When the concave arrives at its normal position, the pin d trips theshifting mechanism in a reverse manner to that of the pin d, and therebydisengages the clutch D5l from the pulley D. A

Operation-Phe operation of the machine is as follows: The concave isadjusted as in Fig. 5 and the substances to be triturated andmixed'placed therein. Motion is given to the triturator and mixer bymeans of the pulley D and driving-belt D(i thereof. After the substancesare completely mixed the clutch-lever is shifted by hand, so as to throwthe pins of the clutch into engagement with the pulley D2, and therebythrough the straight belt I set the concave in motion in a reversedirection to that in which the triturator and mixer is kept revolving.The gradual rotation of the concave causes it to become inverted, andwhile it is making its movement the substances discharge by theirgravity, being aided by the arms of the triturator, said arms by theirrotary movement in a reverse direction to that of the concave acting toforcibly discharge the mixed substances upon the ground or into areceiver. As soon as the concave has reached the position shown in Fig.2 the clutch-lever is unclutched by the pin d striking the unclutchingmechanism and the concave is allowed to rest in its inverted position aslong as desired. For readj ustingthe concave the clutch-lever D4 ismoved in the direction of the arrow 2, Fig. l, thus throw ing the clutchin gear with the pulley D, and thereby causing the crossed belt I tomove the concave back to its normal position. As soon as the concave hasreached its normal position, as shown in Fig. 5, the clutch-pulley isunclutched by the pin d striking the um clutching mechanism, and as soonas this takes place the concave rests in its proper position for againreceivinga mass of substance to be treated. I would state that it ispracticable, although not preferable, to extend the shaft which carriesthe pinion to a driving-pul ley on the engine and to provide inconnection therewith loose pulleys and a clutch and lever for producingthe semi-rotation of the concave. I would also state that as it is, as Ibelieve, a novelty in machines of the type herein described to mix themortar orother substances within a concave which has an intermittentsemi-rotating movement in a backward direction and with an armedtriturator which has a continuously-revolving movement in a forwarddirection and which acts in conjunction with the backward movement ofthe concave and the gravity of the mixed substances for forciblydischarging the finished product, I do not limit myself to the preciseconstruction and arrangement of the gearing shown and described forproducing the said reversed movements, but contemplate adopting anysuitable equivalent construction of gearing for such purpose.

What I claim as my invention isl. In a triturating and mixing machine,in combination, the revolving triturator and mixer, consisting of ashaft extending from IIO end to end of the concave and having shortjournal-shafts projecting beyond the ends of the concave and carryingpulleys and a double-acting clutch, said shaft being provided withtransversely-arranged projecting triturating-arrns, a concave having atthe will of the operator a partially-revolving movement in a reversedirection to the triturator, and means, as described, for operating theshaft and concave, substantially as set forth. 2. The combination of theloose pulleys D D2, shaft ends of the armed triturator and mixer,pulleyD, belts I I', one crossed, doubleacting clutch D3, shaft G,pulleys H H pinion F, and concave B, having rack E on its outerperiphery, substantially as described.

3. The combination of the clutchlever D4,

shifting mechanism consisting of link d4, bellcrank lever d3, lever cl2,and the concave pro vided with tripping-pins d d on one of its ends,substantially as described.

4. In combination with the partially-revolving concave, the trituratorprovided with arms gradually1 ared toward their outer ends, having atriangular form in cross-section and arranged so th at everyintermediate arm overlaps a portion of a preceding arm, substantially asand for the purpose described.

In testimony whereof I affix my signature in presence of two Witnesses.

JNO. H. PARKHURST.

Witnesses:

J. T. GREAVES, ZAcH T. PETTIT.

